Improvement in saw-mill carriages for steadying the logs thereon



ilNiTnn STATES PATTENT Ormea,

l HENRY STANTON, OF RIOHFIELD, NEWT YORK.

IMPROVEMENT IN SAW-MILL CAHHIAGES FOR` STEADYING THE LOGS THEREON.

Speciiication forming part of Leiters Patent No. 3,669, dated July lli,ici-l.

To LZZ whom, it may concern:

Be it known that I, HENRY STANTON, of Richfield, in the county of Otsegoand State of ANew York, have invented a new and useful Improvement inSaw-Mills, which is described as' follows, reference being had to theannexed drawings of the same, making part of this specification.

4Figure l is a top'view; Fig. 2, one of the cogged circular plates orratchet-wheels; Fig. 3, end view; Fig. 4, a view of the pawl and chuck,drawn to a larger scale than in Fig. 3.

These improvements are confined to the apparatus for holding the logfirmly and for setting it on the head and tail blocks toward the saw thedistance ofthe required thickness of boards to be cut.

As the rectangular sliding racks are liable `to become loaded withsawdust, owing to their horizontal and exposed position, and thus interfere with the regularity ot' the cutting, I make 'use of a circularrack, Q, secured on the hub of a horizontal shaft, XV, on which there isa pinion working into a horizontal rack on the under side of the slideS, to which the log is dogged, arranged in the usual manner, saidcircular rack being turned by a forked dog,'R, reversible on its axle atpleasure for turning the ratchet-wheel to the right or left, said axlebeing attached to a lever, T, operated by a r1' ght-angled lever, U,perforated with a round aperture at its angle, through which thehorizontal shaft YV passes, on which the pinion is fixed that moves therack, and on which the lever also turns loosely, one limb of saidrightangled lever (when thev carriage is at rest) standing in a verticalposition and the other in a horizontal position, the vertical side orlimb (as the carriage is gigged back) striking against an oblique bar,X, fastened'to the iioor ofthe mill, by which said lever is turned onthe axle XV, causing its horizontal side to lift a weighted lever, Y,from a spring-dog, or to move a wedge attached to the lever byajointthat holds the slide from moving, and when said spring-dog or wedge isthus liberated a shoulder on the vertical side of the right-angled leverU strikes against the under side of the lever T, to which the forked dogis attached, and this acting against the teeth of the ratchetwheel Q,fastened to the horizontal axle W, which it turns, and with it thepinion fastened to said axle, and this latter, working into a rack onthe under side of the slide S, to which the log is dogged thereto, movessaid slide toward the saw the required distance. The log is secured tothe slide by means of a horizontal rightangled dog, c, driven into itsend, and a hookdog, Z), attached to the slide, by which the log can becut entirely up without leaving any stubshot. The aforesaid horizontaldog a slides in an oblong mortise made in two plates b0lted to the slideS, the said bolts passing vertically through said plates and blocks ofwood placed between the lower of said plates and a right-angledclamp-plate placed upon the slide, and into said slide, the saidclamp-plate being turned at right angles, forming a tongue that enters acorresponding groove in the head or tail block, by which the slide isheld firmly down thereon. The hook-dog b reaches over fronione side ofthe slide, which is turned up at right angles, and perforated for theinsertion of the hookldog.

rIhe aforesaid circular rack or ratchet wheel is made in two parts, onepart being a circular toothed plate, as Q', Fig.l 2, fitted to acircular flange on a hub of the shaft XV. vThe other part is theaforesaid circular flange on the hub of the shaft XV.

The teeth of the ratchet-ring are of a size to correspond with thethickness of boards to be sawed. It'has two or more cogs on its innerperiphery, corresponding with cavities on the outer periphery of thehub, into which they are inserted for locking the said cogged ring tothe flange of the hub to cause them to turn together. The circular racksor ratchets are of the saine diameter and thickness, but the teeth areof various sizes, according to the various kinds of boards to be sawed,changeable at pleasure, all fitted to the same hub and plate. Y i

The aforesaid circular racks being placed in a vertical position oredgewise, and turning vertically,the teeth will be always keptdischarged of any dust that might lodge against them and interfere withthe correct action of the apparatus.

The sweep or movement ofthe dog, and consequently the distanceof themovement of the log and thickness of boards to be cut, is determined bya segment-gage, G, perforated with round holes, into which a pin, F, isinserted, against which the lever T, to which the forked pole or arm isattached, strikes in its descent. In this modification of the apparatusit will be perceived that the spring-clamp is raised entirely from theslide or the Wedge Withdrawn When-the latter isv used before the slidecommences to move from the action of the lever, forked dog, and circularcog rack or ratchet, or when the Wedge is used before it is withdrawnfrom the slide, as stated.

To the outer extremities of the racked slide S, I attach a longitudinalperforated bar, fl, towhich are attached dogs g h, for holding the logat the middle of its length to prevent it from vibrating or springingfrom the heart or sagging. One of the dogs, g, is a bar of iron, with ahook at each end, inserted into the perforated bar, and driven into thelog. The other is a slide, h, and moves horizontally through an aperturein the longitudinal bar f2, passing under the log to prevent sagging Oneend of said bar f2 is attached iirmly to the outer end of the tail-blockslide. The other end `slides through a square socket,v1, attached to thehead-block slide, by which the tail-block can be moved toward or fromthe head-block at pleasure, to suit various lengths;

To prevent the head and tail blocks separating from each other andletting the log fall between, them, or changing their distance apart,

I place a metallic plate, K, edgewise against.

the inneredge of the head and tail block, projeeting above the surfaceof the same, for enf tering notches out .in the under side of the log,which prevents the head and tail block from moving from or towardv eachother.

The foregoing relates to the apparatus as adapted to the saw-mill forsetting the tailblock slide. To adapt the same or a similar apparatusfor setting the head-block slide suddenly when the saw is in the grooveof the .head-block, la Weight must be added to the le-4 ver Tsufficiently hcavy'to move the slide, with the'end of the log thereon,the position of the pawl being reversed.

The operation is as follows: As the carriage is gigged back, thevertical limb of the rightangled lever U strikes against the side of theoblique bar fastened to the iioor of the mill, and corresponding withthe one at the tail end of the carriage, (marked X,) causing theshoulder thereon to lift the lever T, with the Weight suspended thereto,and at the same time raising the pawl over the teeth of theratchet-Wheel, Without turning it, until the said vertical limb passesby or slips over the end of the said oblique bar X, which takes placethel moment the saw is entirely out ofthe log and in the groove, whenthe Weight descends With the lever T, carrying with it the pawl attachedthereto, which at thesame time, engaging With the teeth of theratchet-Wheel, causes it to turn, and its axle W and theV pinion meshinginto the rack of the head-block slide, which moves the slide and logsuddenly toward the saw, and thus sets the log Without interfering withthe saW.

b, Fig. 4, shows a slot in the pawl. c is a sliding chuck placed in saidslot b, through which the-bolt passes that connects the lever T to thepaWl; d, a screw to hold the chuck.

Vhat I claim as my invention, and which I desire to secure by LettersPatent, is

1. The arrangement of the longitudinal bar 2 and dogs g h, attached to"the ends .of the slides of the head and tail blocks for supporting thelog at the middle in the manner described above.

2. The arrangement of the vertical plates k on the head and tail blocks,for entering notches made in the under side of the log to pre' vent ithaving any movement longitudinally while being sawed7 as described.

HENRY STANTON. lVitnesses:

WM. P. ELLIOT,

ALBERT E. .IoHNsoiL

